// client.cpp : Defines the entry point for the application.
//

#include "stdafx.h"
#include "client.h"
#include <WindowsX.h>
#include <WinSock2.h>
#pragma comment(lib,"WS2_32.lib")
#define MAX_LOADSTRING 100

// Global Variables:
HINSTANCE hInst;								// current instance
TCHAR szTitle[MAX_LOADSTRING];					// The title bar text
TCHAR szWindowClass[MAX_LOADSTRING];			// the main window class name
SOCKET client;

// Forward declarations of functions included in this code module:
ATOM				MyRegisterClass(HINSTANCE hInstance);
BOOL				InitInstance(HINSTANCE, int);
LRESULT CALLBACK	WndProc(HWND, UINT, WPARAM, LPARAM);
INT_PTR CALLBACK	About(HWND, UINT, WPARAM, LPARAM);

int APIENTRY _tWinMain(HINSTANCE hInstance,
                     HINSTANCE hPrevInstance,
                     LPTSTR    lpCmdLine,
                     int       nCmdShow)
{
	UNREFERENCED_PARAMETER(hPrevInstance);
	UNREFERENCED_PARAMETER(lpCmdLine);

 	// TODO: Place code here.
	MSG msg;
	HACCEL hAccelTable;

	// Initialize global strings
	LoadString(hInstance, IDS_APP_TITLE, szTitle, MAX_LOADSTRING);
	LoadString(hInstance, IDC_CLIENT, szWindowClass, MAX_LOADSTRING);
	MyRegisterClass(hInstance);

	// Perform application initialization:
	if (!InitInstance (hInstance, nCmdShow))
	{
		return FALSE;
	}

	hAccelTable = LoadAccelerators(hInstance, MAKEINTRESOURCE(IDC_CLIENT));

	// Main message loop:
	while (GetMessage(&msg, NULL, 0, 0))
	{
		if (!TranslateAccelerator(msg.hwnd, hAccelTable, &msg))
		{
			TranslateMessage(&msg);
			DispatchMessage(&msg);
		}
	}

	return (int) msg.wParam;
}



//
//  FUNCTION: MyRegisterClass()
//
//  PURPOSE: Registers the window class.
//
//  COMMENTS:
//
//    This function and its usage are only necessary if you want this code
//    to be compatible with Win32 systems prior to the 'RegisterClassEx'
//    function that was added to Windows 95. It is important to call this function
//    so that the application will get 'well formed' small icons associated
//    with it.
//
ATOM MyRegisterClass(HINSTANCE hInstance)
{
	WNDCLASSEX wcex;

	wcex.cbSize = sizeof(WNDCLASSEX);

	wcex.style			= CS_HREDRAW | CS_VREDRAW;
	wcex.lpfnWndProc	= WndProc;
	wcex.cbClsExtra		= 0;
	wcex.cbWndExtra		= 0;
	wcex.hInstance		= hInstance;
	wcex.hIcon			= LoadIcon(hInstance, MAKEINTRESOURCE(IDI_CLIENT));
	wcex.hCursor		= LoadCursor(NULL, IDC_ARROW);
	wcex.hbrBackground	= (HBRUSH)(COLOR_WINDOW+1);
	wcex.lpszMenuName	= MAKEINTRESOURCE(IDC_CLIENT);
	wcex.lpszClassName	= szWindowClass;
	wcex.hIconSm		= LoadIcon(wcex.hInstance, MAKEINTRESOURCE(IDI_SMALL));

	return RegisterClassEx(&wcex);
}

//
//   FUNCTION: InitInstance(HINSTANCE, int)
//
//   PURPOSE: Saves instance handle and creates main window
//
//   COMMENTS:
//
//        In this function, we save the instance handle in a global variable and
//        create and display the main program window.
//
BOOL InitInstance(HINSTANCE hInstance, int nCmdShow)
{
   HWND hWnd;

   hInst = hInstance; // Store instance handle in our global variable

   hWnd = CreateWindow(szWindowClass, szTitle, WS_OVERLAPPEDWINDOW,
      CW_USEDEFAULT, 0, CW_USEDEFAULT, 0, NULL, NULL, hInstance, NULL);

   if (!hWnd)
   {
      return FALSE;
   }

   ShowWindow(hWnd, nCmdShow);
   UpdateWindow(hWnd);

   return TRUE;
}

//
//  FUNCTION: WndProc(HWND, UINT, WPARAM, LPARAM)
//
//  PURPOSE:  Processes messages for the main window.
//
//  WM_COMMAND	- process the application menu
//  WM_PAINT	- Paint the main window
//  WM_DESTROY	- post a quit message and return
//
//
HWND hButton,hButton1;//hButton ->Connect to server,hButton1->Register nick name
HWND hNick;
BOOL OnCreate(HWND hWnd, LPCREATESTRUCT lpCreateStruct)
{
	hButton = CreateWindow(_T("BUTTON"),L"Connect",WS_CHILD | WS_VISIBLE | BS_PUSHBUTTON, 50,50,50,50,hWnd,(HMENU)ID_BUTTON,hInst,NULL);
	hNick = CreateWindow(_T("EDIT"),NULL,WS_CHILD | WS_VISIBLE |WS_DISABLED |WS_BORDER, 25,25,500,25,hWnd,NULL,hInst,NULL);
	hButton1 = CreateWindow(_T("BUTTON"),L"Register",WS_CHILD | WS_VISIBLE | BS_PUSHBUTTON, 550,25,100,25,hWnd,(HMENU)ID_BUTTON1,hInst,NULL);
	return TRUE;
}

CHAR* Convert(TCHAR*str, int len)
{
	
	CHAR* dest = new CHAR[len+1];
	int i;
	for ( i = 0 ; i < len && str[i]!='\0' ; i++)
	{
		dest[i] = (CHAR)str[i];
	}
	dest[i] = '\0';
	return dest;
}

LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
	int wmId, wmEvent;
	PAINTSTRUCT ps;
	HDC hdc;
	//=====================================================
	//Tao socket client
	WSADATA wsadata;
	WSAStartup(MAKEWORD(2,0),&wsadata);

	struct sockaddr_in clientaddr;
	memset(&clientaddr,0,sizeof(clientaddr));
	clientaddr.sin_family = AF_INET;
	clientaddr.sin_port = 1234;
	clientaddr.sin_addr.s_addr = inet_addr("127.0.0.1");

	client = socket(AF_INET,SOCK_STREAM,0);
	//======================================================
	switch (message)
	{
	HANDLE_MSG(hWnd,WM_CREATE,OnCreate);
	case WM_COMMAND:
		wmId    = LOWORD(wParam);
		wmEvent = HIWORD(wParam);
		// Parse the menu selections:
		switch (wmId)
		{
		case ID_BUTTON1:
			{
				int number;
				TCHAR temp[100];
				CHAR *buff;
				CHAR result[sizeof(int)];
				do
				{
					SetWindowText((HWND)hNick,_T(""));
					GetWindowText((HWND)hNick,temp,100);
					buff = Convert(temp,100);
					MessageBox(hWnd,(TCHAR*)&buff,NULL,MB_OK);
					send(client,buff,100,MSG_DONTROUTE);
					recv(client,result,sizeof(int),0);
					number = result[0];
					if(number > 0)
						MessageBox(hWnd,_T("Register Successful!"),_T("Server"),MB_OK);
					else
						MessageBox(hWnd,_T("Register fail"),_T("Server"),MB_OK);
				}while(number == 0);
				shutdown(client,SD_BOTH);
				closesocket(client);
				WSACleanup();
			}break;
		case ID_BUTTON:
			{
				//
				EnableWindow(hButton,FALSE);
				//
				/*WSADATA wsadata;
				WSAStartup(MAKEWORD(2,0),&wsadata);
				
				struct sockaddr_in clientaddr;
				memset(&clientaddr,0,sizeof(clientaddr));
				clientaddr.sin_family = AF_INET;
				clientaddr.sin_port = 1234;
				clientaddr.sin_addr.s_addr = inet_addr("127.0.0.1");

				client = socket(AF_INET,SOCK_STREAM,0);*/

				if(connect(client,(sockaddr *)&clientaddr,sizeof(clientaddr))!=0)
					MessageBox(hWnd,_T("Can't connect to server at this time.Try later!"),_T("Error"),MB_OK);
				else
					//Connect success!
				{
					char s[sizeof(int)];
					//get success signal to register nickname from server
					recv(client,s,sizeof(int),0);
					if(s[0] == 1)
					{
						EnableWindow(hNick,TRUE);
						MessageBox(hWnd,NULL,NULL,NULL);
					}	
				}
			}break;
		case IDM_ABOUT:
			DialogBox(hInst, MAKEINTRESOURCE(IDD_ABOUTBOX), hWnd, About);
			break;
		case IDM_EXIT:
			DestroyWindow(hWnd);
			break;
		default:
			return DefWindowProc(hWnd, message, wParam, lParam);
		}
		break;
	case WM_PAINT:
		hdc = BeginPaint(hWnd, &ps);
		// TODO: Add any drawing code here...
		EndPaint(hWnd, &ps);
		break;
	case WM_DESTROY:
		PostQuitMessage(0);
		break;
	default:
		return DefWindowProc(hWnd, message, wParam, lParam);
	}
	return 0;
}

// Message handler for about box.
INT_PTR CALLBACK About(HWND hDlg, UINT message, WPARAM wParam, LPARAM lParam)
{
	UNREFERENCED_PARAMETER(lParam);
	switch (message)
	{
	case WM_INITDIALOG:
		return (INT_PTR)TRUE;

	case WM_COMMAND:
		if (LOWORD(wParam) == IDOK || LOWORD(wParam) == IDCANCEL)
		{
			EndDialog(hDlg, LOWORD(wParam));
			return (INT_PTR)TRUE;
		}
		break;
	}
	return (INT_PTR)FALSE;
}
